Improvement in pump-pistons



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lniitd giant @anni SOLOMON CROW'ELL,- OF SYRAC-USE, NEW YORK.

. Leners Patent No. 87,148, ma Fama/ry 23, 1869.

IMPROVEMENT 1N PUivrp-PrsToNs.

The Schedule referred to'in these Iietters Patent and making p'art of tha nine.

To all whom 'it may. concern:

Be it known that I, SOLOMONOROWELL, of Syracuse, in the county of Onondaga, and State of, New York, have inventeda new and useful Improvement in Pumps; and I do hereby 'declare that the following is a full, clear, and exact description thereof, which will enable those skilled in the art to make and use the same, .referencebeing had to the accompanying drawings, forming part of this specification, .in which` the view shown is a vertical section of a pump having my improvement. 4 This invention relates lto certain improvements in that class of pump-boxes, or valves, which are made gf leather or'other exible material, and of `a conical orm.

The upper edges of such valves have heretofore been supported'by straps of leather, but such strapssoon stretch, or lengthen out, so as to let the body of the valve down, and the valve gets so out of shape that it is soon impaired or Worn out.

These valves are used chiefly in sheet-metal canalboat pumps, and they are used so. irregularly that the valve is`liable to'be dried up, and much-out of shape when wanted.

To obviate these objections, Isupport the upper edges of the valve by strips of spring-metal, so that the edges of said valve are, free to move radially, but are not allowed to sag or settle down, and the valve thereby'get-out-of shape. And also'to make it keep its form to a greater degree when in disuse, or to not get out'of shape by being dried up, I place'a spring inside of the cone, as hereinafter more fully explained.

In the accompanying drawings'- AA is theconical leather valve;

B is the pump-rod, or staff; and.

C C are strips of spring-metal, for Iholding 'up the body ofthe valve.

D is a spiral spring, for holding the valve distended, and for making it retain its-shape when dried up.

i By the use of the spiral spring, a piece of flimsy leather can be made to answer the purpose of the best sole-lea ther.

The metallic strips, or bands O C, are riveted to the staff, and their lower ends secured to the edge of the valve, as usual, or they may be extended to the lower part of the valve, and there secured.

A at spring, placed on the inside of the valve at its top, can be used in place ofthe spiral spring shown.

At least one end of the distending-spring D is left free to move around in direction ofthe coil.

This construction of valve is found to entirely overcome the objections which it is designed to obviate. V

I am aware that a valveI has been made in which the lower ends of the metallic supporting-straps are extended down to the lower end of point of the cone,

.and there secured to the rod; therefore I d o not claim this.

-Having thus described my invention,

What 'I claim as new, and desire to secure by Letters Patent, is`

The combination of the valve A, spiral spring D, supporting-straps G, and rod B, all as and for the purposes herein set forth.

The above specification of my invention signed by me, this 25th day of June, 1868.

Witnessesr WM. J. DODGE, F. A. MORLEY.

SOLOMON OBOWELL. 

